Dental unit



May 29, 1934. w MElER 1,960,446

DENTAL UNIT Filed Nov. 28. 1931 INVENTOR ATTORN Patented May 29, 1934 UNITED STATES PATENT- OFFIE 1 Claim.

This invention relates to improvements in dental appliances, particularly to a swaging unit which I call the Meier-Unit, and it is the principal object of my invention to provide a unit ineluding a plunger formed into a handle into which the mold. block holding the matrix material is screwed, adapted to be removed therefrom and to be screwed into a weighted block which forms a stable and handy support for the mold 110 block allowing a ready carrying of the same from place to place, so that the crowns or caps embedded in the matrix material may be worked upon by the various tools used in dentistry.

Another object of my invention is the provision of a unit of simple and, therefore, inexpensive construction, yet durable and highly efficient in operation.

A further object of my invention is the provision of a unit whereby dental crowns can be formed with less labor and greater accuracy than has heretofore been possible.

These and other objects and advantages of my invention will become more fully known, as the description thereof proceeds and will then be more specifically defined in the appended claim.

In the accompanying drawing forming a mate rial part of this disclosure:

Fig. l is a sectional elevation of a block for supporting the mold block and forming part of the unit according to my invention, the section being taken on line 11 of Figure 2.

Fig. 2 is a top plan view thereof.

Fig. 3 is a sectional detail view of a mold block carrying the matrix material.

Fig. 4 is a longitudinal section through a swage and plunger.

Fig. 5 illustrates in front elevation, partly in section, the plunger in form of a handle, with 49 the mold block and a cap or crown embedded in the material holding the same on the block.

As illustrated, a plunger 10 used in swaging having the form of a handle, as indicated at 11, is used in the customary manner within a chamber 12. The inner end of the plunger has formed therewith a threaded socket 13 into which is adapted to be screwed the threaded stem 14 at the underside of a mold or support 15 for the amalgam or cement 16 into which the cap or crown 1'7 is embedded. Mold 15 has an opening 18 formed in its flange for the insertion of a suitable tool to unscrew its stem from the pocket 13.

5 In order to allow a convenient and ready working on the crown or cap by the various tools, I screw the stem 14 into a weighted base 19.

The upper face of the mold 15 is concaved as at 20, and the base 19 has a central bore 21 to seat the stem 14.

In use, I prepare the metal die from an impression in the usual manner and place the crown or cap to be swaged upon said die working upon the same by the plunger in the well known manner, I then remove the mold plate 66 with the cap or crown to be worked upon from the chamber and can use the plunger which is formed as a handle for conveniently handling the device, or I unscrew the mold plate and screw it into the base 19 allowing a convenient working 70 upon the crown or cap by the various tools.

It will be understood that I have described and shown the preferred form of my unit as one example only of the many possible ways to practically construct the same, and that I may [6 make such changes in its general arrangement and in the construction of the minor details without departure from the spirit of my invention, and the principles involved.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

In a plunger for dental units, a body formed into a handle by suitably reducing the material of the body intermediate its ends and a threaded socket formed in one of its ends, a mold or support having a concave head for the amalgam or cement into which a cap or crown is to be embedded, a threaded stem on the underside of said mold adapted to be screwed into said socket, a flange formed with said mold and having an opening therein for the insertion of a suitable tool for unscrewing the stem from the socket.

WILLIAM J. MEIER. 

